In order to have Map Box Vector Tiles support enabled, you’ll need to compile with protobuf support
and pkg-config to verify the correct minimum version of protobuf-c see protobuf
for details. ST_FrechetDistance
function will not be enabled if PostGIS is compiled with lower than GEOS 3.7.0.
GEOS 3.7.0 is not released yet but is expected sometime next month.

Most aggregates now marked as parallel safe,
which means most aggs have to be dropped / recreated.
If you have views that utilize PostGIS aggs,
you’ll need to drop before upgrade and recreate after upgrade

B-Tree index operators < = > changed to provide better spatial locality on sorting
and have expected behavior on GROUP BY. It now works on exact geometry instead of bounding box.
If you have btree index for geometry or geography, you need to REINDEX it, or review
if it was created by accident and needs to be replaced with GiST index.
If your code relies on old left-to-right box compare ordering,
update it to use << >> operators.

_ST_DumpPoints removed, was no longer needed after PostGIS 2.1.0
when ST_DumpPoints got reimplemented in C

More Posts

The PostGIS development team is pleased to provide
bug fix 2.5.2, 2.4.7, and 2.3.9 for the 2.5, 2.4, and 2.3 stable branches.

These are the first versions to be able to compile against Proj 6.0.0,
You must upgrade to these if you are using Proj 6.

2.5.2
This release supports PostgreSQL 9.3-11
(will compile against PostgreSQL 12, but not pass tests. Use only for pg_upgrade.
You are encouraged to use the PostGIS 3.0 unreleased branch with PostgreSQL 12
, which has features specifically designed to take advantage of features new in PostgreSQL 12).